weitling



3- Sheetsshe'et L W, WEITLING. Sewing Machine.

Patented Dec. 24. 1867.

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Sewing" Machine. No. 72,574. Pa tgnted- Dee 24, 1867.

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wi; L L IA M- W 1 T LIN e. OF N E W Y 0 R K, N. Y. Letters Patent No. 72,574, dated December 24, 1867,

IMPROVEMENT IN SEWING-MACHINES TO ALL WHOM IT MAY CONCERN:

Be it known that I, WILLIAM Wrirrnxmuf the city and county of New York, and State of New York, have invented certainnew and useful Improvements in Sewing-Machines; and I do hereby declare that the following is a full, clear, and exact description of tho construction andpperaticn of the sanmrefcrence being had to the accompanying drawings, in which-.- I x Figure 1 represontsa perspective viewof my SCWlng-p1aChlnL Figure 2 represents a similar view reversed.

Figures 3, 4, 5, represent .diifercnt posi of the same.

Figure 6 represents, aperspective view of the upper side and edge of the stitch made by the machine when used for button-hole work or for edging. I I

Figure 7 represents a rear view of the parts which constitute niy'devicc' for winding the thread upon the shuttle-spool. I

tions of the needle, thread-carrier, and hook, showing the operation To enable others skilled in the art to make and use myinvention, I will proceed to describe its construction andoperation.

A represents the frame of the machine B represents the platform, and C the driving-wheel, whose shaft, D, communicates motion to the bevel-wheel E and cam-plate F. The crank-pin G is secured to the face of the cam-plate F, and, by means of the pitman I-I, communicates motion to the needle-bar I, to which the pointed needle a, and a blunt thread-carrier, b, are secured, as shown on the drawings. Theneedle a pierces the cloth in the ordinary manner, whilathe thread-carrier?) passes along the edge of the cloth, or through the slit of the button-hole, and when they begin to rise, the shuttle underneath the platform passes through the loops of both. the thread-carrier and needle, in a manner hereafter fully to be described, interlacing the'two threads by the action of the looper, and thus a stitch is made suitable for edging or button-hole work. I represents a bevelwheel, which is operated by the bevel-wheel E, and which has an adjustable crank-arm, K, secured to its outer face, whose crank-pin, c, operates the connecting-rod L, which, latter operates the looper-hook d. The frame M, to which the looper. d is attached, may either be permanently secured to the frame A of the machine, orit may be secured to the foot-bar N, so that item be raised or lowered with the same. Said frame M is provided with two lugs f, which serve as hearings to the rock-shaft g, and to one end of 'whichthe lever or shank O of the'looper d is pivoted at lawhile its-other end is provided with a toe or plate, P, whose end is pressed against;

the circumference of the-cam F, by the action of the spring k, and the plate 1? is thusacted upon by the cam at certain intervals. The looperd thusreceivcs a compound motion, one resulting from the action of the bevelwheel I, and causing the looper to turn on its pivot 7t, and the other resulting from the action of the cam F, and resulting in the swinging of the looper at on its rock-shaft g, both motions thus resulting in a compound motion of the-ghook d, which, at ca'chstroke of the needle, describes a curve around the lower part of the threadcarrier b,'the hook takingthe thread of the needle a from under it and laying it in loop-form under the threadcarricr 6,,whicli passes through this loo-pond through the slitin the button-hole.

I In the drawings, I have shownthe needle-thread in'red, and the thread of the thread-carrier in blue lines.

When the needle and thread-carrier are at their highest ascending point, as shown at fig. 3, the position ofthe hook at is as represented in said. figure. When the needle and thread-carrier begin to descend, hook d catches the threads from under the needles, and carries them forward and around the lower part of the thread-carrier, as represented at fig. 4. The thread of the thread carricr Iris by this operation drawn aside to clear the way for the passage :of the thread-carrier; When the needle and thread-carrier have aifrived at their lowest point, the shuttle and its thread pass through the loops ofboth the upper threads, as follows The thread of, the needle clos in loop-form around the threaiLcarriQr, as represented at iig.. 5, holding the thread of tl io thread-carrier in its groove, and aiding thus in securing thcformation of theloopon the lowerfacc of the cloth, as the needle and'earr'ierzcommence to rise for the passage of the shuttle, which loop in the thread of the piercing nccdle a is created by the closing, of the fabric around the threads and needle at the period of its rising. The needle and thread-carrier then ascend. again to their highest position, and thc operation is repeated, In this operation, a buttoh-hole or edging-stitch is obtained by the inter-looping of the thread of the nccdlewith that of the thread-carrier on the upper side of the edge or button-hole, and by the inter looping of both 'oY-th'se threads with that of the shuttle on the lower side of the button-hole, and which results in a stich, the upper side of which is represented in a perspective view at fig. 6.

My machine may be provided with two looper-hooks, d, bent in opposite directions, and by properly adjhst ing and shaping the cam F, either of the hooks may be used, and the thread of the needle may be laid in loopform under the thread-carrier, or the thread of the thread-carrier under that of the needle.

In sewing-machines in which a shuttle in any form is used, the thread must be wound up upon the shuttlespool. This is a tedious operation, and I havc devised a mechanism by which said winding is effected automatically by the sewing-machine while in operation, without interrupting the work thereof. This winding-apparatus is constructed as follows:

A lever, Q, is pivoted at m, to thebracket Rot the frame A, and its upper end is pressed against the face of either the treadle or the driving-wheel C, by the action of the spring n. The face of the treadle or drivingwhel is cam-shaped, and when it turns, it causes the lower eye-pointed end of the lever Q to vibrate over the entire length of the shuttle-bobbin S, which is set right opposite to it. Thebobbin-shuttle is set into a chuck, 0, which is supported by the frame T attached to the platform 13, and its end is supported by the point of the screw-shaft p, in a similar manner as an article to be turned is set into a lathe. The chuck o is revolved by means ofa pulley, q, over which a cord or belt, r,'passes to the circumference of the trcndlc or driving-wheel Cl, and the thread from the bobbin U is passed through the eye 6 of the lever Q, which, when the machine is in operation, will lay it smoothly and with great regularity over thc 'bohbin-slmttle, and when the latter is full it can be removed by loosening the screwy. To regulate the tension of the belt or cord r, I use a guide-pulley,

V, which is supported on an adjustable arm, W, which is fastened to the bracket X by means of a screw, 8, which latter passes through a slot at, and by adjusting the position of the pulley V, the belt 1' can be tightened or slackened at pleasure.

Having thus fully described the nature of my invention, what I claim herein as new, and desire to secure by Letters Patent, isr 1 The combination of a hoolepointed lever, with the thread-carrier, piercing-needle, and shuttle of a sewing-machine,'and operating substantially as and for the purposes described. Y

2. The application to sewing-machines of a thread-winding apparatus, constructed and operated as described. 3. Giving motion to the thread-leading lever of a winding-apparatus attached to a sewing-machine, by

making the rim of the driving-wheel cam-shaped to operate said lever, substantially in the manner and for the purposes set forth. l

4. In combination with the threadq rinding device herein described, I claim the adjustable guide-pulley V,

for adjusting the tension of the cord 1, by which the t-hreadewinding apparatus is operated, substantiallyin the manner herein described.

WILLIAM WEITLING.

Witnesses:

CLEMENS MULL R, HENRY Animns. 

